Scenario 1. A researcher is interested in examining whether sleep depravation influences cognitive ability. She randomly assigns a group of college students to either sleep for 8 hours or 0 hours, and then the following day asks them to complete a series of difficult cognitive tasks.

Flag question: Question 1

Question 1 1 pts

What is the most appropriate test statistic to use to test the hypothesis in scenario 1?

Group of answer choices

Dependent samples t-Test

Correlation Coefficient

z-score

z-test

Factor Analysis

One-way ANOVA

Structural Equation Model

Independent samples t-Test

Flag question: Question 2

Question 2 0.25 pts

What is the null hypothesis for scenario 1?

Group of answer choices

H0: cognitive performance for 0 hour group > cognitive performance for 8 hour group

H0: cognitive performance for 0 hour group

H₀: r_xy = 0

H₀: cognitive performance for 0 hour group

cognitive performance for 8 hour group

H0: cognitive performance for 0 hour group =cognitive performance for 8 hour group

H₀: 1(o hours) = 2(8 hours) =3(control)

Flag question: Question 3

Question 3 0.25 pts

What is the alternative hypothesis for scenario 1?

Group of answer choices

H1: cognitive performance for 0 hour group

cognitive performance for 8 hour group

H1: 1(o hours)

2(8 hours)

3(control)

H1:cognitive performance for 0 hour group < cognitive performance for 8 hour group

H1: cognitive performance for 0 hour group > cognitive performance for 8 hour group

H1: rxy = 0

H1: cognitive performance for 0 hour group = cognitive performance for 8 hour group

Flag question: Question 4

Question 4 0.5 pts

What is the independent variable for scenario 1?

Group of answer choices

Whether participants slept for 0 hours or 8 hours

The participants

Cognitive ability

There is no IV for this type of analysis

The researchers

Flag question: Question 5

Question 5 0.5 pts

What is the dependent variable for scenario 1?

Group of answer choices

The participants

Cognitive ability

There is no DV for this type of analysis

Whether participants slept for 0 hours or 8 hours

The researchers

Flag question: Spacer

Scenario 2. A researcher wants to know if there is an association between volunteering and feelings of happiness. She expects that spending more time volunteering is associated with higher feelings of happiness.

Flag question: Question 6

Question 6 1 pts

What is the most appropriate test statistic to use to test the hypothesis in scenario 2?

Group of answer choices

Correlation Coefficient

F-test

Independent samples t-Test

Z-score

Dependent samples t-Test

P-test

Regression Analysis

One sample z-Test

One-way ANOVA

Flag question: Question 7

Question 7 0.5 pts

What is the independent variable for scenario 2?

Group of answer choices

Happiness

There is no IV for this type of analysis

The participants' workload

The type of job they have

Time spent volunteering

Flag question: Spacer

Scenario 3. A researcher wants to explore how ratings of stress change before and after 30 minutes of aerobic exercise.

Flag question: Question 8

Question 8 1 pts

What is the most appropriate test statistic to use to test the hypothesis in scenario 3?

Group of answer choices

One-way ANOVA

T-test for the significance of the correlation coefficient

One sample Z-test

Independent samples t-Test

P-test

Regression Analysis

F-test

Dependent samples t-Test

Z-score

Correlation Coefficient

Flag question: Question 9

Question 9 0.5 pts

What is the null hypothesis for scenario 3?

p0 words

Flag question: Question 10

Question 10 0.5 pts

What is the alternative hypothesis for scenario 3?

p0 words

Flag question: Question 11

Question 11 0.5 pts

What is the independent variable for scenario 3?

p0 words

Flag question: Question 12

Question 12 0.5 pts

What is the dependent variable for scenario 3?

p0 words

Flag question: Spacer

Scenario 4. A researcher is interested in examining how different types of distracting activities impact how safely participants drive. She randomly assigns participants to engage in one of three types of activities (eating, talking on the phone, and listening to loud music), and compares the number of driving mistakes participants make on a closed driving course.

Flag question: Question 13

Question 13 1 pts

What is the most appropriate test statistic to use to test the hypothesis in scenario 4?

Group of answer choices

One-way ANOVA

Correlation Coefficient

Dependent samples t-Test

Independent samples t-Test

One sample Z-Test

Z-score

P-test

Regression Analysis

Flag question: Question 14

Question 14 0.25 pts

What is the null hypothesis for scenario 4?

Group of answer choices

H₀: 1eating

2music

H₀: 1phone = 2eating

H₀: rxy = 0

H0: 1phone

2music

H_O: posttestA = pretestB

H₀: Meating= music

H_O: 1(eating) = 2(phone) =3(loud music)

Flag question: Question 15

Question 15 0.25 pts

What is the alternative hypothesis for scenario 4?

p0 words

Flag question: Question 16

Question 16 0.5 pts

What is the independent variable for scenario 4?

Group of answer choices

The number of driving mistakes drivers make

The participants

The type of distracting activity

The closed driving course

How many years participants had been driving

The number of traffic accidents the participants have been in

Flag question: Question 17

Question 17 0.5 pts

What is the dependent variable for scenario 4?

Group of answer choices

The closed driving course

The type of distracting activity

The number of traffic accidents the participants have been in

The number of driving mistakes drivers make

The participants

How many years participants had been driving

Flag question: Spacer

Scenario 5: A medical school wants to see how the MCAT scores for their new first-year students compare to the MCAT scores for all first year medical students in the country.

Flag question: Question 18

Question 18 1 pts

What is the most appropriate test statistic to use to test the hypothesis in scenario 5?

Group of answer choices

Dependent samples t test

Independent samples t-test

Regression

Z-score

Correlation coefficient

One sample z-test

One way ANOVA

Flag question: Question 19

Question 19 0.25 pts

What is the null hypothesis for scenario 5?

Group of answer choices

H0: m1 (sample)

m2 (population)

H0: X1 (sample) = X2 (population) = X3 (control)

H0: X (sample) = (population)

H0: X (sample) > (population)

r > 0

H0: X (population)

(sample)

Flag question: Question 20

Question 20 0.25 pts

What is the alternative hypothesis for scenario 5?

Group of answer choices

H1: X1 X2 X3

H1: X

H1: m1 < m2

r 0

Flag question: Question 21

Question 21 2 pts

Come up with your own study idea, just like the scenarios you see in the questions above. Explain the study (just like in scenarios above), and then tell me the following information for your study. Make sure this is your own original study idea!

IV:

DV:

Null Hypothesis:

Alternative Hypothesis:

Type of Analysis you would use to test the hypothesis in your study:

p0 words

Flag question: Question 22

Question 22 2 pts

Now, pretend you actually ran the study you came up with. Make up the results (the test statistic values, means and SDs), and write up the results as you would see them in an APA style research paper. Note, you do not actually have to do any calculations here! You just need to make up the means and sds for each group, the test statistic value, and the p value and write out the results. You can use the answers to the write up questions on the previous 4 assignments as a template for this!

Research methods

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